2868391 has 4 divisors (see below), whose sum is σ = 2871792. Its totient is φ = 2864992.

The previous prime is 2868367. The next prime is 2868407. The reversal of 2868391 is 1938682.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1938682 = 2 ⋅969341.

It is a cyclic number.

It is not a de Polignac number, because 2868391 - 2⁷ = 2868263 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2868391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2868331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 630 + ... + 2476.

It is an arithmetic number, because the mean of its divisors is an integer number (717948).

2^2868391 is an apocalyptic number.

2868391 is a deficient number, since it is larger than the sum of its proper divisors (3401).

2868391 is a wasteful number, since it uses less digits than its factorization.

2868391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3400.

The product of its digits is 20736, while the sum is 37.

The square root of 2868391 is about 1693.6324866983. The cubic root of 2868391 is about 142.0843081969.

The spelling of 2868391 in words is "two million, eight hundred sixty-eight thousand, three hundred ninety-one".